Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 99-112 |
| Seitenumfang | 14 |
| Fachzeitschrift | Renewable energy |
| Jahrgang | 118 |
| Frühes Online-Datum | 31 Okt. 2017 |
| Publikationsstatus | Veröffentlicht - Apr. 2018 |
Abstract
Designing jacket substructures for offshore wind turbines demands numerous time domain simulations to face different combinations of wind, wave, and current states. Regarding sophisticated design methods incorporating structural optimization algorithms, a load set reduction is highly desirable. To obtain knowledge about the required size of the design load set, a study on fatigue limit state load sets is conducted, which addresses mainly two aspects. The first one is a statistical evaluation of random subsets derived from probabilistic load sets with realistic environmental data obtained from the research platform FINO3. A full set comprising 2048 load simulations is gradually reduced to subsets and the results are compared to each other. The second aspect is a systematic load set reduction with the assumption of unidirectional wind, waves, and current. Firstly, critical directions are determined. Then, unidirectional load sets are systematically reduced. The corresponding damages are compared to those obtained from probabilistic load sets for eight test structures. It is shown that the omission of wind-, wave-, and current-misalignment does not necessarily imply an excessive simplification, if considered wisely. The outcome of this study can be used to decrease the numerical effort of the jacket design process and the levelized costs of energy.
ASJC Scopus Sachgebiete
- Energie (insg.)
- Erneuerbare Energien, Nachhaltigkeit und Umwelt
Ziele für nachhaltige Entwicklung
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in: Renewable energy, Jahrgang 118, 04.2018, S. 99-112.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - A comprehensive fatigue load set reduction study for offshore wind turbines with jacket substructures
AU - Häfele, Jan
AU - Hübler, Clemens
AU - Gebhardt, Cristian Guillermo
AU - Rolfes, Raimund
N1 - Funding information: [ We gratefully acknowledge the financial support of the German Federal Ministry for Economic Affairs and Energy (research project Gigawind life, FKZ 0325575A ), the Lower Saxony Ministry of Science and Culture (research project ventus efficiens, FKZ ZN3024 ) and the European Commission (research project IRPWind, funded from the European Union's Seventh Framework Programme for research, technological development, and demonstration under grant agreement number 609795 ) that enabled this work. This work was supported by the compute cluster which is funded by the Leibniz Universität Hannover , the Lower Saxony Ministry of Science and Culture (MWK), and the German Research Foundation (DFG) .
PY - 2018/4
Y1 - 2018/4
N2 - Designing jacket substructures for offshore wind turbines demands numerous time domain simulations to face different combinations of wind, wave, and current states. Regarding sophisticated design methods incorporating structural optimization algorithms, a load set reduction is highly desirable. To obtain knowledge about the required size of the design load set, a study on fatigue limit state load sets is conducted, which addresses mainly two aspects. The first one is a statistical evaluation of random subsets derived from probabilistic load sets with realistic environmental data obtained from the research platform FINO3. A full set comprising 2048 load simulations is gradually reduced to subsets and the results are compared to each other. The second aspect is a systematic load set reduction with the assumption of unidirectional wind, waves, and current. Firstly, critical directions are determined. Then, unidirectional load sets are systematically reduced. The corresponding damages are compared to those obtained from probabilistic load sets for eight test structures. It is shown that the omission of wind-, wave-, and current-misalignment does not necessarily imply an excessive simplification, if considered wisely. The outcome of this study can be used to decrease the numerical effort of the jacket design process and the levelized costs of energy.
AB - Designing jacket substructures for offshore wind turbines demands numerous time domain simulations to face different combinations of wind, wave, and current states. Regarding sophisticated design methods incorporating structural optimization algorithms, a load set reduction is highly desirable. To obtain knowledge about the required size of the design load set, a study on fatigue limit state load sets is conducted, which addresses mainly two aspects. The first one is a statistical evaluation of random subsets derived from probabilistic load sets with realistic environmental data obtained from the research platform FINO3. A full set comprising 2048 load simulations is gradually reduced to subsets and the results are compared to each other. The second aspect is a systematic load set reduction with the assumption of unidirectional wind, waves, and current. Firstly, critical directions are determined. Then, unidirectional load sets are systematically reduced. The corresponding damages are compared to those obtained from probabilistic load sets for eight test structures. It is shown that the omission of wind-, wave-, and current-misalignment does not necessarily imply an excessive simplification, if considered wisely. The outcome of this study can be used to decrease the numerical effort of the jacket design process and the levelized costs of energy.
KW - Fatigue limit state
KW - FINO3
KW - Jacket substructures
KW - Lattice substructures
KW - Load set reduction
KW - Offshore wind energy
UR - http://www.scopus.com/inward/record.url?scp=85033436026&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2017.10.097
DO - 10.1016/j.renene.2017.10.097
M3 - Article
AN - SCOPUS:85033436026
VL - 118
SP - 99
EP - 112
JO - Renewable energy
JF - Renewable energy
SN - 0960-1481
ER -